Combined type-writing and computing machine.



W. WRIGHT. COMBINED TYPE WRIIING AND COMPUTING MACHINE.

APPLICATION FILED APR-23,1910.

Patented July 9, 1918. 5 SHEETS-SHEET I ../IIIIII m Mw o bw .N Hmm.. E@ u G n.. Q mw w Nw @w Q N W. WRIGHT.

COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED APR.23. I9Io` 1 ,27 1,820. Patented July 9, 1918.

5 SHEETS-SHEET 2.

if @I W.

W. WRIGHT.

COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED APR. 23, I9I0.

1 ,271 ,820. Patented July 9, 1918.

5 SHEETShSHEET 3.

/W/JV @ffm W. WRIGHT. COMBINED TYPE WRITING AND COMPUTING MACHINE.

4APPLICATION FILED APR. 23. T910. 1,271,820. Patented July 9, 1918.

E 5 SHEETS-SHEET 4. nwm' lq .--Y K w. WRIGHT, y COMBINED TYPE WRITING lAND COMPUTING MACHINE.

APPLICATION FILED APR.23. |910. I

Patented July 9,1918.

s SHEETS-SHEET s.

UNITED sTATEs PATENT oEEIoE.

WALTER WRIGHT, 0F NEW YORK,

N. Y., ASSIGNOR TO UNDERWOOD COMPUTING MACHINE COMPANY, OF NEW YORK, N. Y., A CORPORATION 0F NEW YORK.

COMBINED TYPE-WRITIN G AND COMPUTING MACHINE.

Specification of Letters Patent.

Patented .rely 9, 191s.

Application filed April 23, 1910. Serial No. 557,273.

To all whom, it may concern.'

Be it known that I, WALTER WRIGHT, a citizen of the United States, residing in New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Combined Type- 1Writing and Computing Machines, of which the following is a specification.

This invention relates to computing mechanism, particularly that which is combined with typewriting mechanism, and has to do principally with means for preventing premature or false movements of the keys.

One of the main objects of the invention is to provide improved means for preventing the operation of any numeral key, any alphabet key, or any other carriage-controlling key of the typewriter, during the rotation of the computing mechanism; a part of which is usually connected to the typewriter carriage for a denominational movement concomitantly with the letter-feeding movement of the carriage, whence, it becomes desirable that nothing shall occur to move the carriage while the adding mechanism is rotating.

This feature of the improvement has for its object to provide a quickly acting keylocking mechanism, such that there will be no interference with the operation of the keys, even when the latter are operated at very high speed, unless a false or premature stroke is made by the operator.

To this end, I provide a universal bar which is directly actuable by all of the alphabet keys, and moves idly at every key stroke. This universal bar is controlled by a locking mechanism which normally is held released by the primary escapement-wheel of the computing mechanism. Said bar is constantly in position to he actuated by the key levers, and is actuated at every stroke thereof. It cannot check the key strokes, and hence the keys may be operated rapidly, unless a key stroke be attempted while said primary escapement wheel is rotating and hence no longer holds the said universal bar unlocked. The numeral keys are preferably also controlled by the same key-locking mechanism, by means of another universal bar or device.

The invention is shown in connection with the devices disclosed in my pending application No. 554,452, tiled April 9, 1910, in which a dog which releases the primary escapement wheel of the computing mechan ism 1s connected directly to the paper carriage of the typewriter to be operated thereby; a rack being connected to said carriage, and a pallet, which is connected to said dog, b elng adapted to cooperate with said carriage rack to enable the carriage to actuate the dog in such a manner that the primary escapement wheel of the adding mechanism 1s released by said dog at the concluding portion of the letter-feeding movement of the carriage; said pallet being normally disengaged from said rack during the operation of the alphabet keys, and the numeral keys having means for moving said pallet into engagement with said rack to be operated thereby.

While the present improvements are of special value when combined with a paper carriage which controls or feeds the escapement wheel of the computing mechanism, they are also of value in some cases in which such an escapement wheel is released, fed,or controlled solely by the numeral keys without the intervention of the carriage.

According to another feature of the present improvements, the universal bar already referred to, which is operated at every stroke of every alphabet key, is also employed for the purpose of preventing concomitant operation of an alphabet key with a numeral key; there being provided for this purpose, as set forth in my application No. 556,378 tiled April 19, 1910, now Patent No. 1,237,438, a set of mutually interfering blades, each of which is movable to a common central position, so as to prevent operation of the others. One of these blades is connected to said universal bar, and the remaining blades are connected individually to the remaining keys. Hence when a numeral key is depressed, it is impossible to depress an a1- phabet key, and vice versa.

Thus a simple structure prevents simultaneous operation of a numeral key and an alphabet key, and alsoy prevents operation of any key during the rotation of the computing mechanism.

4The foregoing improvements are illustrated in connection with a checking device which prevents premature reversal of the movement of a numeral key. By a very simple construction, whichv Apermits very rapid operation of the keys, all the foregoing advantages are secured.

Also according to the present improvements, the spacing key of the typewriter, and also the tabulating keys which are usually provided for the carriage, are connected to the locking mechanism already re-` ferred to, so as to be controlled thereby as already set forth. A s1ngle device preferablyl extends from saigll;I universal bar to said space key and .said tabulating keys, through which all the locking functions referred to can be performed; so that all of the-keys which control the 'carriage are, by means of a very simple, easily operated and rapidly moving structure, prevented from operating said carriage during the rotation of the computing mechanism, and are also prevented from operating concomitantly with any numeral key.

Other objects and advantages inafter appear. U 5

In the accompanying drawings,

Figure 1 is a part-sectional side elevation of an Underwood front strike writing machine provided with the present improvements.-

Fig. 2 is a sectional elevation of part of the gear connection between the masterwheel of the computing mechanism and the devices by which said master-wheel is operated. u

Fig. 3 is a rear elevation of the principal features of the computing mechanism seen at Fig. 1; the parts shgwn innormal positions.

Fig. 4 is a plan of the lower portion of the computing and typewriting devices.

Fig. 5 is a perspective view illustrating the releasing or feeding of the secondary escapement-wheel of the computing mechanism, from the position at Fig. 6.

Fig. 6 is a rear perspective view ofthe principal members of the mechanism which enables the paper carriage of the typewriter to release `or feed the escapement wheel of the computing mechanism; and also of the several key-locking devices.

Fig. 7 is a side elevation of the primary escapement wheel of the computing mechanism, showing also the cam which returns the escapement pins to normal positions.

Fig. 8 is a rear elevation showing a portion of the rack-and-pallet mechanism which enables the carriage to actuate the feeding devices of the computing mechanism; the pallet being shown depressed into engagement with a curvedA rack connected to the carriage.

Fig. 9 is a view illustrating the completion of the actuation, by the carriage, of the devices which feed or release the escape-' ment-wheel of the computing mechanism.

will herep Fig. 10 is a diagrammatic elevation of a set of interfering blades .connected to the ke s, one of said blades being shown in effective position,` whereby it prevents the operation of the other blades, and `hence of the keys controlled thereby.

Typewwltz'ng mechanism-The typewriting mechanism includes alphabet and character keys 1 and numeral keys 2, all mounted upon levers 3, having returning springs 4 and connected by means of elbow levers 5 with type-bars 6, to cause the latter to swing upon pivots 8 to the platen 7.

Each type-bar carries a heel 9, to press rearwardly a universal bar 10, mounted upon a frame 11, the latter pivoted at its rear end to idle arms 12". Said universal bar frame 11 swings rearwardly a dog rocker 12 carrying a feeding dog 13 and a detent dog 14, whereby a paper-carriage 15 is given its letter-feeding motion, said carriage being propelled by a spring 15a. Said dogs move into and out of engagement with an escapement vwheel 16, which is connected to a pinion 17, the latter meshing with a rack 18 upon said carriage. Upon the universal bar is rovided an actuator 19 for a ribbon-vibrating lever 20. As so far described, the parts are in common use upon the Underwood typewriting machine.

Whenever a key is depressed, the elbow lever 5 is swung forwardly, and the typebar is swung rearwardly against the platen to make an impression thereon, and the uni- `versal bar pushes the feeding-dog 13 out of engagement with the escapement wheel 16, and the detent dog 14 into engagement with said wheel; no letter-feeding motion of the carriage occurring at this time. Upon relieving the key from pressure, the parts are returned to normal positions in the usual manner, the universal bar being returned by a spring 21, and moving the detent dog out of engagement with thel escapement wheel 16, and the feeding-dog 13 into engagement therewith; said feeding-dog permitting the carriage to advance a letter space under the iniuence of the driving spring 15a, as usual. l

Computing meccnism.-All of said keys control the letter-feeding movements of the carriage 15; but only the numeral keys 2 are connected to the computing mechanism, which is power-driven, its motor being indicated at 22, and being connected by a suitable train of gearing to the adding or dial wheels 23, and a primary escapement wheel 24, the latter being under the control of the numeral keys V2, whereby the keys are enabled to determine how far the computing wheels 23 shall be rotated by the motor 22.

Preferablyfthe motor 22 is constantly revolving, although the primary escapement wheel 24 remains motionless, together with the computing wheels, until the keys 2 are operated. The connection from the motor includes an suitable friction clutch 25, whereby is c riven a shaft 26, the latter having a pinion 27 meshing with a pinion 28, whereby is rotated a shaft 29, havlng atits opposite end a pinion 30. To the last 1s connected, by means of a gear 31, a pm ion 32 upon a shaft 33, the latter also having a pinion 34, which is connected by means of a pinion 35 tovertical shaft 36, thelatter carrying a pinion 37, meshing wlth a p1n1on 38 fixed upon shaft 39, which carries a master-wheel 40, arranged interiorly of a series of computing wheels, in the shape of rings 41, having internal teeth 42 to engage the projecting master-wheel teeth. The computing wheels are supported u pon a special carriage or frame 43, wlnch 1s c onnected by arms or lugs. 44 to the typewr1ter carriage 15, to travel therewith, whereby the computing wheels are given a denominational movement, relatively to the stationary master-wheel, at every letter-feeding movement of the main carriage 15.

For carrying tens from one computlng wheel to the next, there may be employed lany of the devices illustra\ted in any of my pending applications, or any other suitable tens-carrying devices. with gears on dial wheels 23.

The primary escapement wheel 24 is connected to the described train of gearing by means of pinion 45, on the shaft of the escapement Wheel, said'pinion meshing with or number bearing gear 46 fixed to gear 31 already described.

Said escapement wheel 24 carriesa set of settable pins or teeth 47, one of which is projected and in engagement with a fourtoothed pinion 48 (Fig. 6), which is connected to a secondary escapement wheel 49, the latter normally pressing against a feedin dog 50. I

`he movement of said dog 50 releases the secondary wheel 49, to be turned by the projecting escapement pin or tooth 47, so that the succeeding tooth of the four-toothed pinion 48 may be engaged by the next projected tooth 47, to arrest the primary escapement wheel 24, and hence the described train of gearing, including the computing wheels 41. l

The escapement pins 47 are projected by means of the numeral keys 2, the latter being connected by links 51, pendent from belllcranks 52 and having hooks 53 to engage suitable projections or parts 54 on the key levers 3. The bell cranks are connected by horizontal links 55 to arms 56, suitably pivoted at 57, and preferably formed at their oppositeends with cams 58, for camming the escapement pins 47 from normal positions to projected positions, to enable them to engage' the four-toothed pinion 48. With the exception o f the The wheels 41 mesh and allows the latter v escapement wheel 16. At

cams 58, the computing.

mechanism details so far described, are set forth in certain of my said pending applications. y

. Carriage-operated campement-The dog 50 is operated at the letterfeedingmove ment o the paper carriage 15 of the typewriting machine. For this purpose, a rock Shaft 59, on which vided with an arm 60, connected by a link 61 to an upstanding lever 62, to which is pivoted at 63 a pallet 64 having a tooth 65 normally standing idly above a curved rack or toothed Wheel 66. The latter is fixed to the shaft 67 which carries the escapement wheel 16 of the paper carriage 15, so that the two Wheels 16, 66 revolve in unison, or as if constituting a single wheel. v

It will be understood that during the ordinary operation of the paper carriage 15, the wheel 66 may revolve, but the pallet 64 lies idle as in Figs. 3 and 6. All of the numeral keys, however, have means to depress the pallet into engagement with the wheel 66, so that during thesucceeding movement of ythe paper carriage, said pallet will be forced by the wheel 66 toward the right, from the position of Fig. 8 to that of Fig. 9 thereby vibrating the lever 62, and through the link 61 swinging the feeding dog 50 over to free the secondary escapement wheel 49, as at Figs. 5 and 9.

he movement of the pallet 64 is effected by any of the numeral keys 2 through the arms 56, said arms being normally ladapted to engage a universal disk or member 68, around which the arms are grouped radially. Said disk is mounted upon aguide rod 69 and has a returning spring-70. Upon the rod 69 is provided a head or collar 71, and the end of a lever 72 is confined between said head and said universal bar or member 68 to be operated thereby. The lever is pivoted at 73to any fixed support, and connected by a link 74 to an arm 75 of a bell crank 76, a second arm 77 thereon being connected by a link 78 to a lever 79, the latter having a pin 80 to engage said pallet 64 to depress the same.

Operation-In the operation of the parts so far described, the keys 1 may be manipulated for ordinary typewriting in the manner already set forth. en a. numeral key 2 is depressed, it also swings up its type-bar to print, and the type-bar operates the universal bar frame 11 of the letter-feeding mechanism, the rear of the latter engaging a projection 12 on the dog rocker and moving the feeding-dog 13 out of engagement, and the detent dog 14 into engagement with the the same time the link 51 is pulled down by said key` and bell crank 52 is turned, and by means of the link 55 swings arm 56, thereby operating the universal member 68 and the lever 72, which,

through the link 74, bell crank 76 and link said dog is fixed, is pro` ISL , connected to the latter, including the lever ward pressure oflever 79, and the projection 83 presses the detent aside, and descends to the Fig. 8 position, Where 1t may be held down by the same detent against the lifting .tension of spring 81. During the depression of the key 2, there is no endwise movement of the pallet 64, and the dog 50 remains motionless, and continues to hold the secondary escapement wheel 49 against movement, as well as the primary escapement wheel 24. i

During the swinging of the arm 56 effected by the depression of the key 2, the cam 58 on said arm engages the adjacent pin 47 on the main escapement wheel 24, and projects the same into position to engage the four-toothed pinion 48. No other movement of any part of the adding mechanism occurs upon the down stroke .of the key; the adding wheels all remaining stationary upon such down stroke.

Upon the relief of the key 2 from pressure, the type bar andkey lever are returned to normal positions, together with arm 56, cam 58, universal member 68, and the parts 79. Upon the return of the type bar from the platen, the spring 21 moves the universal bar forwardly, and the detent dog 14 escapes from, and the feeding-dog 13 moves into line with the escapement wheel 16 of the carriage 15, and the spring 15a is permitted to pull said carriage one letter space.

The wheels 16 and 66 are accordingly moved the distance of one tooth, and the pallet 64 is forced to the right from the position at Fig. 8 to the position at Fig. 9, the lever 62being vibrated, and through the link 61, arm 60 and rock shaft 59 moving the feeding dog 50 to permit rotation of the secondary escapement wheel 49, by means of the projecting pin 47; the succeeding tooth of said pinion 48 being engaged by the pin 47 which was projected by the key 2 which has just been released, thus determining the extent of rotation of the power-driven primary escapement wheel 24 and hence of the master wheel 40 and of the computing wheel 4l with which the master wheel is at the time in engagement; a stationary cam 47 (Fig. 7) returns the projected pins 47.

This release of the secondary escapement wheel 49 occurs at the linal portion of the letter-feeding movement of the paper carriage 15.

The succeeding tooth of the secondaryescapement wheel 49 may be Iarrested by la at Fig. 9, the pin 83 on the pallet rides along the under side of a point or trip 85 which is formed upon the bottom of a fixed bracket 86; the spring 81 tending constantly to lift said pin 83. v

As soon as pallet 64 has been driven by the wheel 66 far enough to the right, at Fig. 9, the pin 83 is lifted by the spring 81 past the tip of the point 85, and thel spring 87 at once draws the pallet 64 to the left, the pin 83 riding upalong an inclined portion 88 of the point 85, whereby said projection 83 is lifted, and tooth 65 is brou ht up clear of the wheel 66; said spring 8 returning the parts to normal positions, including lever 62 and dogs 50 and 84, and the tooth of the secondary escapement wheel 49 slipping off from the detent 84, and resting in its normal position against the feeding dog 50. The spring 87 may be connected to an ear 89 formed on the pallet 64, and may be attached to a lug 90 provided upon the frame of the typewriter; and the pallet 64 may have an adjustable stop 91 to engage said lug, so that said pallet shall be held in proper position for engagement with the teeth of wheel 66, as at Fig. 3; the adjustable stop 91 permitting the pallet 64 to accommodate any variation in the normal position of the teeth of the wheel 66.v

The carriage 15 thus effects or controls the rotation of the computing master wheel 40, the relative denominational movement between which and the computing wheels is also controlled by said carriage.

The links 51 (Fig. 6) which connect the keys 2 to the bell crank 52 are passed through holes 92 in a horizontal bar 93.

The latter may also be shifted endwise to the left (Fig. 3) to disconnect said links, so that the keys 2 may be operated without actuating any part of the adding mechanism, and without causing the pallet 64 to move down into engagement with the wheel 66. Said bar 93 may be provided with a linger piece 94, and a detent 95 may hold the bar at either end of its movement. It

will thus be understood that the links 5 1 swing around points 9'6 at which they are pivoted to the bell cranks 52; their released positions being shown in dotted lines at Fig. 3.

The parts so far detailed areV disclosed and claimed in my application No. 554,452, filed April 9, 1910.

` ment wheel .carries the dog 50, so

Means controlled by pm'marg/ eseapement wheel for .locking the numeral heya-It ywill be observed that the cam 58 is not effective until the nal portion of the depression oa numeral key 2, so that the primary escape- 24 has the interval between the arrest of the paper carriage 15 and the completion ofthe next down stroke of a numeral key in which to turn, this interval being usually suiiicient for the purpose, even when the keys are manipulated rapidly. As a safeguard, however, a device is provided for preventing the operation of a during the rotation of ment wheel 24.

This safety device` may comprise a link 100, having' at one end aneye orv slotv 101 through which the lever 72 extends, and pivoted at the other end at 102 to an arm 103 formed, upon a tumbler 104, which is pivotedloosely upon the said primary escapethat the tumbler and rock shaft may rotate independently of each other. Said rock shaft is movable endwise, and the tumbler 104 is confined between shoulders or collars 105 fixed upony the rock shaft, so as to partake of the longitudinal movement of the latter. A leaf spring 106, pressing against the end vof the rock shaft, tends to move it'to the right at Fig. 6; but this tendency is normally overcome by the pressure of the tooth of the secondary escapement wheel 49 upon the dog 50 xed to said rock-shaft. The tumbler 104 is therefore normallyheld free from an abutment or or stop pin 107 provided upon a fixed bracket 108, and hence the tumbler may swing idly during-the strokes of the numeral keys 2. l

Every4 time that the Secondary escapement wheel 49. is released from the dog 50 however, the spring 106 snaps the shaft 59 to the right at Fig. 5, so that the tumbler 104 is brought beneath the abutment 107 thus preventing any numeral key from operating, sincev the abutment 107 arrests or locks against rotation the tumbler 104, and hence prevents movement of the link 100, the bar 72, the universal disk or member 68, all the arms 56, the links 55, bell cranks 52, the links 51 and the keys-2. This locking is eiiective until the primary escapement wheel 24 0f the computin mechanism completes its rotation, and trough the pinion 48 causes the succeeding tooth of the secondary escapement wheel 49 to press against the dog (84 or 50) to move the shaft 59 to the left at Fig. 6 against the tension of spring 106, thereby releasing the tumbler 104 from the stop 107 and hence permitting the operation of the train of devices connected to said tumbler through the link 100.

Alphabet-kay locln-To prevent any of the alphabet keys 1 from operating the carnumeral key rock shaft 59 which. f

riage-feeding mechanism while the primary escapement Wheel 24 of the computing mechanism is rotating, the link 100, extending from the tumbler 104, may be prolonged at .109 and formed at its end with an eye or slot 110, in which may be inserted the end of a lever 111; the latter pivoted between its ends at 112 upon any suitable fixed support. Said lever 111 is shown pivoted at 113 at the other end to a link 114, the end of which is pivoted at 115 to a bell crank 11,6, pivoted at 117 upon a fixed support.

To 'this bell crank is pivoted at 118 the \upper end of a pendent link 119, having at its lower end a hook 120 to engage under an arm 121. This arm is mounted loosely upon a rock shaft 122, (upon which latter are fixed the forwardly extending levers 123 bearing theusual word-spacing key 124 at the front of the keyboard). This arm 121 orms one of a pair, the other member of the pair being designated as 125, and both being loosely pivoted upon said rock shaft connected by a bar 126 122, and being rigidly close to said shaft 122. At their forward ends said arms 121, 125 support a horizontal bar or rod 127, extending across the machine in front of the keys 2 and directly beneath those key levers 3 which bear the alphabet keys 1. The rod 127 is fixed to the arms 121, 125. These parts, taken together with the bar 126, form a rigid frame, which may be swung down about the pivot 122`by depression of any of the alphabet keys 1, as will be understood from inspection of Fig. 1; said frame having a returning spring 12 a It will also be understood that the engagement of the succeeding tooth 49 of the secondary escapement wheel with the dog 84 or 50 will move the shaft 59 endwise and release the tumbler 104 from the stop 107, thus permitting the link 100, 109 to be moved endwise again, and hence permitting any alphabet or character key to be depressed. In this manner, re-operation of the carriagefeeding devices 11, 13, 14, is prevented while the prlmary escapement wheel 24 is turning, and while the master wheel 40 is rotating oneof the computing wheels 41, and hence there is no liabilityof relative movement in axial direction occurring between the master wheel and the computing wheels during such rotation, so that liability of error is avoided.

Space-key leale-ln order also to prevent the space key 124 from operating the carriage-feeding devices during the rotation of said primary escapcment wheel 24 of the computing mechanism, I hang from said rod 127 a pair of links 128, carrying lugs 129 which project beneath said levers 123 of the space key. It will be understood that the eifect or purpose of these lugs 129 with respect to the space key is similar to that of the bar 127 with respect to the alphabet keys 1; and hence that the lspace key cannot be depressed to operate the carriage-feeding devices, until the tumbler 104 is released by the escapement wheel 24. As is usual in the Underwood machine, the rock shaft 122 of the space key is provided with an arm 130, to operate an arm 131 extending forwardly and downwardly from the idle arms 12X.

Tabula/,ting te lacie-Said Underwood machine is also requently provided with a tabulating mechanism, comprising depressible keys 132 upon the forward ends of 1evers 133, which are fulcrumed at 134 between their ends and articulated at their rear ends at 135 to upstanding thrust-rods 136, which carry at their upper ends-denomination stops 137, to engage column stops 138 carried upon a rack 139 which is usually secured to the paper carriage 15. Said thrust rods 136 are adapted to cause a movement of the paper carriage 15; lugs or shoulders 140 on said thrust rods 136 engaging a short universal bar 141, which is supported by an arm or arms 142-upon a rock shaft 143, the latter having an arm 144 connected by a link 145 to a lever 146, having a roll 147 to engage and lift the letter-feeding rack 18 upon the carriage 15. Y

In order to prevent depression of a tabulator key 132, and hence a movement of the carriage 15, during the rotation of the primary escapement wheel 24, the links 128 may be extended downwardly at 148, and

carry at their lower ends a horizontal rod or bar 149 extending across the machine beneath the tabulating key levers 133.. The bar 149 is, of course, controlled by the tumbler 104 in the manner already described respecting the bar 127 and lugs 129. Thus it will be seen that no movement of any of the carriage controlling devices can occur if the power-driven computing mechanism is rotating.

To summarize, it will be seen that besides feeding the carriage, the principal function of the type-operating numeral keys 2iis to set the escapement pins 47 for determining the extent of rotation of the computing devices, and that upon the carriage itself depen s not only the relative denominationall movement between the ,master wheel 40 and the computing wheels 41, but also the actual rotation of said wheels, and that further operation of the carriage-feeding or spacing may be in the form of a segment having the pivot 57 as a center; the pin-setting-cam 58 being formed upon the outer portion of said blade. These blades 150 (which are carried upon the ends of extensions 151 of said arms 56) are loosely guided in a series of radial slots 152 formed in a support 153; and the tips of the blades occupy a row'which forms the principal portion of a circle, around a small central opening 154 in said support 153.

So long as the opening 154 (Fig. 10) is occupied by a blade, no other blade can pass through said opening, as it will' encounter the lirst blade, and hence it will be impossible to operate any of the remaining ligure keys until the first key is returned to or substantially to normal position. Thus, each numeral key 2 interferes with the operation of all the other numeral keys, so that it is notl practicable to depress more than one numeral key at a time; and as soon as one numeral key is partly depressed, thedepression of any other numeral key is prevented.

Means for causing interference' between eaehnwmeral leeg enel the alphabet mel otherl heya-The link 114 is extended from 155 to connect at 156 with an arm 157 having an extension 158, the latter carrying an interfering blade 159 guided in one of the slots 152: said arm 157 corresponding in construction and operation throughout with the arms 56, except that it has no cam 58 for setting the pins 47, nor 'does it operate the universal disk, or member 68, the latter being accordingly cut away as shown. It will be seen that whenever the frame 121, 125, 126, 127 is depressed, the link 119 is pulled down, the bell crank 116 is rocked, the link 114, 155 is pulled, thel arm 157 turned, and the blade 159 caused to enter the small central opening 154 in the lixture 153, thereby preventing the entrance of any of the blades 150, so that none of the numeral keys 2 can be depressed.

Thus there is' prevented not only the operation of a numeral key prematurely after the depression of the spacekey or an alpha- -to depress a numeral key before the paper carriage has completed its tabulati'ng run,

and before releasing will be seen that by this invention the depression of any of the carriage-controlling keys 1,l 124 or 132, blade 159 into position to prevent operation of'any numeral keys.

This invention, of course, prevents the simultaneous downward movement of a numeral ke and any of the other keys 1, 124

or 132, since the blade 15,9 cannot enter thel central opening 154 at the same time with any of the blades 150.

It also prevents the o eration of any of the keys l, 124 or 132 w` ile a numeralkey is depressed; since when the central opening 154 is occupied by any blade 150, the blade 159 cannot enter said opening, but will collide with said blade 150.

It will thus be seen that the frame or member 121, 125, 126, 127, which is operated by all of the alphabet keys 1, the space key 124 and the tabulator keys 132, notonly serves to lock all of said keys against actuation during the rotation of the primary escapement Wheel 24 of the computing mechanism, but also, by being connected to the additional interferentie blade premature operation of' any of said keys with respect to any of .the adding keys, or vice versa.

The slot 101 isof sufficient length to permit the actuation of the tumbler 104 by the frame 121, etc., without operating the lever 72 which extends through said slot; and the slot 110 is of sufficient length to permit said lever 72 to operate the rod 100, 109 to swing the tumbler 104 without operating the lever 111.

Key @keda-'Each of the bell cranks 52 (one of these beinV provided for each numeral key) is pre erably provided (as set forth in application No. 543,603, lfiled February 12, 1910, by Walter Wright and'Gustave O. Degener and patented August 14, 1917, No. 1,237,008,) with a segmental ratchet 160 (Fig. 3), and pivoted upon the ratchet (Fig. 3), and pivoted upon the frame of the machine at 161 is a pawl 162 to engage the teeth of said ratchet in a manner to prevent premature reversal of the 'associated key. When the key starts to move down, the pawl engages the ratchet and prevents return movement of the key, so that it becomes ncessary to press the key down to the limit of its movement, whereupon the ratchet will clear the pawl, and the latter will be swung by its spring 163 into position to rengage the ratchet on the upward stroke of the key, and preventanother down stroke thereof before the key'- returns to normal position.

From this construction, it results that the operation of any numeral key mustV be completed before any alphabet ey can be operated, since the interfering blade 150 which the tabulator key.v It

movesv the interfering 159, prevents l vprovided with a similar ratchet'to coperate with a similar pawl, this being particularly useful in connection with the tabulator keys, to insurethat the down stroke of the tabulator key shall be finished, and also that it shall return to normal position before being reoperated. This will prevent liability of a computing numeral key being operated during a partial operation of the tabulating mechanism, or a false movement of any of thetabulating parts or of the carriage and hence none of the alphabet lieg disconnection-Www the handle 94 l is operated to carry the bar 93 to the left at Fig. 3, thereby disconnecting the type-operatin numeral keys from the computing mec anism (through the engagement of said bar with the links 51), the link 119 is also swung toi the left to the dotted-line position seen at Fig. 3, thereby disconnecting the crank 116 from the .arm 121, so that the alphabet keys, the space key and the tabulator keys can no longer be locked; although of course it will be understood that the usual line-locking mechanism (not shown) will still be effective to lock the keys at the end of every line of writing.

Variations may be resorted to Wit-hin the scope of the invention, and portions of the improvement may be used Without others.

Having thus described my invention, 1 claim:

1. The combination of a power-driven computing mechanism having an escapement Wheel, a carriage, said computing mechanism including a member connected to have a denominational step-by-step movement at the feeding movement of the carriage; a set of numeral keys; means to lock the keys against operation; a carriage-feeding device controlled by said keys, a dog device restraining said escapement wheel; means controlled by the carriage at its letter-feeding movement to operate said dog device to release said escapement wheel; and mechanism extending from said keys to said escapement wheel, to determine the extentof movement of the latter; said dog device being movable by the pressure of said escapement wheel; and having means effective at such movement to release said keys.

ineffective means operated by the carriage at its letter-feeding movement to `initiate a movement of said escapement Wheel, means controlled by said numeral keys to render said last mentioned means effective, mechanism extending from said numeral keys to said escapement Wheel to determine the extent of movement of the latter, and means normally held released by said escapement Wheel, but rendered effective during the rotation thereof, f or preventing operation of said keys. D

3. In a combined typewriting 'and computing machine the combination 'of a powerdriven computing mechanism having anescapement wheel, a dog device to release and arrest said escapement Wheel, a carriage, al-

phabetical and numeral type-operating keys,

nism extending from said numeral keys to said escapement Wheel to determine the extent of escapement of the latter, and means to lock both said numeral and alphabet keys against operation; said key-locking means normally held released by the pressure of said escapement Wheel upon said dog device, and including a spring to displace said dog device and lock the keys When the dog de- 'vice releases the escapement Wheel.

4.111 a combined typewriting and computing machine, the combination of a powerdriven computing mechanism having an escapement Wheel, a dog device to release and arrest said escapement Wheel, a carriage, alphabetical and numeral type-operating keys, a carriage-feeding device controlled by all of said keys, normally ineective means operated by said carriage at its step-by-step movement to initiate a movement of said escapement Wheel, means controlled by said numeral keys to render said last-mentioned means effective, means also controlled by said numeral keys to determine the extent of movement of said escapement Wheel, a spring to displace said dog device when the latter releases said escapement wheel under the control of said carriage, a tumbler also displaceable by said spring, an abutment to be engaged by the displaced tumbler to lock the latter, and means conecting both the alphabet and numeral keys to said tumbler to lock said keys.

5. The combination of a step-by-step feeding carriage, a rack connected thereto, a pallet normally out of enga-gement with said rack, .a set of numeral keys having means to control said carriage, a universalbar or disk operable by said numeral keys, a device operated said universal bar to set said pallet into engagement with said rack to be operated thereby, a dog device operable by said pallet, means to return the pallet tonormal position together with said dog device, a computing mechanism including a member connectedto said carriage to have a denominational movement, means, including an escapement Wheel, controlled by said dog device to release and stop said computing mechanism, means controlled by said keys to determine the extent of movement of said computing mechanism, a tumbler connected to said universal bar to be operated idly thereby, a spring having means to displace said dog device and said tumbler when the dog device releases the escapement Wheel, and an abutment engaged by the displaced tumbler to prevent Voperation of the latter, the dog device and tumbler being returnable'to normal positions by pressure of said escapement Wheel.

i. The combination of a computing mechanlsm includin a power-driven esca-pement Wheel provided With settable escapement teeth, keys having means to set said teeth, a. feeding dog normally restraining said escapement Wheel, a detenty dog normally disengaged from said Wheel, a step-by-step feeding carriage controlled by said keys, said computing mechanism including a member connected to said carriage to have a denominational movement, and means, including a. rock shaft Whereon said dogs are mounted, controlled by said carriage to operate said shaft and thereby said feeding dog to release said escapement Wheel, means to return said shaftand thereby said feeding dog to again restrain said escapement, a spring to displace said rock-shaft endwise when the escapement Wheel escapes from the feeding dog, a tumbler displaceable with said rock shaft, an abutment engaged by the displaced tumbler to prevent operation of the latter; the rock-shaft and tumbler being returnable to normal positions by pressure of said escapement Wheel upon the feeding dog; said tumbler being loosely mounted upon said rock shaft and confined between collars or shoulders thereon, and connections betWeen said numeral keys and said tumbler to lock said keys during movement of said escapement Wheel.

7. In a combined typewriting and adding machine, the combination of numeral L ing mechanism having an escapement Wheel the extent of Whose rotation is controlled all of said keys upon the 'being f normally by said numeral keys, means dependent upon escapement wheel, a tumbler connected to said alphabet keys to be moved thereby, an abutment, said tumbler being normally held by ,said escapement Wheel out of engagement with said abutment, and means to move said tumbler into engagement with said abutment to lock said alphabet keys upon the release of said escapement wheel, to thereby prevent printing by an alphabet key during computation.

8. In a combined typewriting and adding machine, the combination of type-operating numeral keys, type-operating alphabet keys, a step-by-step feeding carriage controlled b v all of said keys, a power-driven computing mechanism including a member which has a denominational step-by-step movement concomitantly with the carriage, said computing mechanismhaving an escapement wheel the extent of whose rotation is controlled by said numeral keys, means dependent upon the operation of the numeral keys for releasing said escapement wheel, a tumbler connected to all of said keys to be moved thereby, an abutment, said tumbler held by said eseapement wheel out of engagement with said abutment, and a spring ,to move said tumbler into engagement with said abutment to lock release of said escapement wheel.

In a combined typewriting and adding machine, the combination of type-operating numeral keys, type-operating alphabet keys, a step-by-step feeding carriage controlled by all of said keys, a power-driven computing mechanism including a member which has a denominational step-by-step movement concomitantly with the carriage, said computing mechanism having an eseapement wheel the extent tion is controlled by said numeral keys, means dependent upon the operation of the numeral keys for releasing said eseapement wheel, a bar mounted to be moved by said alphabet keys at every depression of the latter, means 'for locking said bar against movement, to prevent operation of the keys, and means controlled by said escapement wheel to hold said locking means normally in released position.

10. In a combined typewriting and adding machine, the combination of type-operating numeral keys, type-operating alphabet keys, a step-by-step feeding carriage controlled by all of said keys, a power-driven computing meehanism'ineluding a member which has a denominational step-by-step movement concomitantly with the carriage, said computing mechanism having an escapement wheel the extent of whose rotation is controlled by said numeral keys, means of whose rotadependent upon the operation of the numeral keysfor releasing said escapement wheel, a bar mounted tobe moved by said alphabet keys, at every .depression of the latter, means'for locking said bar against movement to prevent operation of the keys, a tumbler connected to said bar, an abutment, said tumbler being normally held by said escapement wheel to look said alphabet keys.

Y In a combined typewriting and adding machine, the combination of type-operating numeral keys, type-operating alphabet keys, a step-by-step feeding carriage controlled by all of said keys, a powerdriven computing mechanism ineludinga member which has a denominational stepby-step movement concomitantly with a carriage, said computing mechanism having an eseapement wheel the extent of Whose rotation is controlled by said numeral keys, means dependent upon the operation of the numeral keys for releasing said escapement Wheel, a bar mounted to be moved by said alphabet keys at every depression of the latter, means for locking said bar against! movement to prevent operation of the keys, a tumbler connected to said bar, an abutment, said tumbler being normally held by said escapement wheel out of engagement with said abutment, a spring to move said tumbler into engagement with said abutment upon the release of said escapement wheel to lock said alphabet keys, and a universal bar or device independent of said alphabet keys and operable by any of said numeral keys and operatively connected to said tumbler to coperate therewith, to lock and release said numeral keys also.

12. In a combined typewriting and adding machine, the combination of type-controlling numeral keys, type-controlling alphabet keys, a step-by-step feeding carriage controlled by all of said keys, a powerdriven computing mechanism including a member which has a denominational stepby-step movement coneomitantly with the carriage, said computing mechanism having an eseapement wheel the extent of whose rotation is controlled by said numeral keys, a dog device for releasing and stopping said eseapement wheel, means dependent upon the operation of the numeral keys for operating said dog device, a tumbler, means to displace said dog device and said tumbler upon the'relcase of the eseapement wheel by the dog device, 'an abutment engaged by the displaced tumbler to lock the latter against operation, and means associated with the locked tumbler to prevent operation of all of said keys; said dog device and tumbler being returnable to normal positions by said escapement Wheel upon the arrest of the latter.

1 3. ln a combined typewriting and adding machine, the combination of type-controlling numeral keys, type-controlling al phabet keys, a step-by-step feeding carriage controlled by all of said keys, a powerdriven computing mechanism including a member which has a denominational stepby-step movement concomitantly with the carriage, said computinglmechanism having an escapement wheel the extent of whose rotation is controlled by said numeral keys, a dog device for releasing and stopping said\ escapement wheel, means dependent upon the operation of the numeral keys and also controlled by said carriage for operating said dog device, a tumbler, means to displace said dog device and said tumbler upon the release of the escapement wheel by the dog device,means engaged by the displaced tumbler to lock the latter against' operation,

and means associated with the locked tumbler to prevent operation of said alphabet keys; said dog device and tumbler being returnable to normal positions by said escapement wheel upon the arrest of the latter.

14. In a combined typewriting and computing machine, the combination of .a powerdriven computing mechanism having an escapement wheel, a carriage, said computing mechanism including a member connected to have a denominational step-by-step novement at the feeding movement of the carriage; a set of type controlling numeral keys; a set of 'type-controlling' alphabet keys; means to lock all of said keys against operation; a carriage feeding device controlled by said keys; a dog device -restraining said escapement wheel; means operable by the carriage at its letter feeding movement to operate said dog device to release said escapement wheel; andl mechanism extending from said numeral keys to said escapement Wheel,

to determine the extent of movement of the latter; said dog device being movable by the pressure of said escapement Wheel; and hav- Ving means effective at such movement to release all of said keys. v 15. In a combined typewritng and computing machine, the combination of a powerdriven computing mechanisln having in escapement Wheel, a carriage, said computing mechanism including amember to move step-by-step at the feeding movement of the carriage, normally ineffective means operable lby said carriage and extending to said escapement wheel to release the latter, a sct of numeral keys, carriage-feeding devices lcontrolled by said keys, means to enable any of said keys to render effective at the letter feeding movementl of the carria-ge, the devices which extend from said carriage to said escapement wheel, whereby the escapement Wheel is released, mechanism extending from said keys to said escapement wheel to determine-the extent of movement of the latter, a set of type-controlling alphabet keys having means to control said carriage, 4and means normally held released by said escapement wheel, but rendered effective during the rotation thereof, for preventing operation of said alphabet keys.

16. In a combined typewritingand comuting machine, the combination of a powerriven computing mechanism having an escapement wheel,'a dog device to release and arrest said escapement Wheela carriage, al- \phabetical and numeral Vtype-controlling keys, a carriage feeding device controlled by all of` said keys, said computing mechanism including a member'connected to have a denominational step-'by-step movementv at the feeding movement of the carriage, a rack connected to said carriage, a pallet, means to enable said numeral keys to move said pallet into engagement with said rack to be operated thereby, an operative connection between said pallet and said dog device, mechanism extending, from said numeral keys to said esca-pement wheel to determine theextent of escapement of the latter, and meahs to lock said keys against operation; said key-locking means normally held released by the pressure of said escapementl wheel upon said dog device, and including'a spring to displace said dog device and lock the keys when the dog device is operated by said pallet to release the escapement Wheel, and also including a locking and releasing bar mounted to be moved by all of said alphabet keys. I

17. The combination of type-controlling alphabet keys, a computing mechanism inoluding a power-driven escapement Wheel provided with settable escapement teeth, type-controlling numeral keys having means to set Said teeth, a feeding dog normally-restraining said escapement wheel,' a detent dog normally'disengaged from said wheel, 110 a stcp-by-step feeding carriage controlled by all of said keys, said computing mechanism including a member connected to said carriage to have a denomination-al movement', means, including a rock shaft whereon 115 said dogs are mounted,op erable by said carriage to operate said feeding dog to release said escapement wheel, a spring to displace said rock-shaft endvvise when the escapement Wheel'escapes from the feeding dog, a 120 tumbler displaceable withl said rock shaft, an abutment engaged by the displaced tumbler to prevent operation of the latter; the rock shaft and tumbler being returnable to normal positions by pressure' of said escape- 125 ment wheel upon the dog; and a bar movable by said alphabet keys and connected to said tumbler to be locked thereby.

18. In a combined typewriting and adding machine, the combination of numeral 130 Wheel, a member mounted to be operated by said alphabet keys and said space key, means for locking said member a ainst movement to prevent operation o the alphabet and space keys, a tumbler connected to said member, an abutment, said tumbler being normally held by said escapement Wheel out of engagement with said abutment, and a' spring to move said tumbler into engagement with said abutment upon the release of said escapement wheel to lock said alphabet and space keys.

19. In a combined typewriting and adding machine, the combination of numeral keys, type-operating alphabet keys, a stepby-step feeding carriage controlled by all of said keys, tabulating keys forsaid carriage, a power-'driven computing mechanism, including a member Whic vhas a denominational step-bystep movement concomitantly -k With the carriage, said computing mechanism having an escapement Wheel the extent of Whose rotation is controlled by said numeral keys, means eration of the numeral keys for releasing said escapement Wheel, a member mounted to be operated by said alphabet keys and said tabulating keys, means for locking said member against movement to prevent operation of the alphabet and tabulating keys, a tumbler connected to said member, an abutment, said tumbler being normally held by said escapement Wheel free from control of said abutment, and means to cause said abutment to control said tumbler upon the release of said escapement Wheel, to lock said alphabet and tabulating keys.

20. In a combined typewriting and adding machine, the combination of numeral keys, a step-by-step feeding carriage controlled by said keys, tabulating keys for said carriage, a poWer-drlven computing mechanism including a member Which has a denominational step-by-step movement concomitantly With the carriage, said computing mechanism having an escapement Wheel the extent of Whose rotation is controlled by said numeral keys;- means dependent upon the operation of the numeral keys for releasing said escapement Wheel, av member mounted to be operated by said tabulating keys, means for locking said member against movement to prevent operation of the tabu-` lating keys, a tumbler connected to said dependent upon the opmember, an abutment, said tumbler being normally held by said escapement Wheel out of engagement with said abutment, and means to. move said tumbler into engagement with said abutment upon the release of said escapement Wheel to lock said tabulating keys.

2l. In a combined typewriting and adding machine, the combination of type-operating numeral keys, type-operating alphabet keys, a space key, a step-by-step -feeding carriage controlled by all of said keys, tabulating keys for said carriage, a power-driven computing mechanism including a member which has a denominational step-'by-step movement concomitantly with the carriage, said computin mechanism having an escapement Whee the extent of Whose rotation is controlled by said numeral keys, means dependent upon the operation of the numeral keys for releasin said escapement wheel, a member mounte to be operated by alphabet keys, said space key and said' sal tabulatlng keys, means for locking said mem-ber against movement to prevent operation of the alphabet, space and tabulating keys, a tumbler connected to said member, and means to obstruct or lock said tumbler upon the release of said escapement Wheel, to thereby lock said alphabet and space eys; means being controlled by said escapement Wheel'to hold said tumbler normally free of said obstructing means.

22. In a combined typewriting and computing machine, the combination of a stepby-step feeding carriage, a power-driven rotary computing mechanism including a member Which has a denominational step-bystep movement concomitantly with the carriage, a set of numeral keys, a set of typeoperating alphabet keys, means controlled y any. of said keys to cause the carriage to feed, means controlled by the numeral keys to enable the carriage to cause the computing mechanism to rotate, means controlled by said numeral keys to determine the extent of rotation of the computing mechanism, and means to prevent the operation of the alphabet and numeral keys during the rotation of the computing mechanism.

23. In a combined typewriting and computing machine, the combination of a stepby-step feeding carriage, a power-driven rotary computing mechanism including a member which has by-step movement concomitantly with the carriage, a set of numeral keys, a set of typeoperating alphabet keys, a space key, means controlled by any of said keys to cause the carriage to feed, means controlled by the numeral keys conjointly With the carriage to release or feed the computing mechanism, means controlled by said numeral keys to determine the extent of rotation of the a denominational step' feeding carriage, a power-driven rotarycarriage, a set of numeral keys,

ing the rotation of the computing mechanism. i

24. The combination of a step-bystep computing mechanism'including a member lWhich has a denominational step-bystepv movement concomitantly Wlth thecarriage,

a set of numeral keys, means controlled by any of said keys to cause the carrlageto feed, tabulating keys for sald carriage, means controlled by the numeral keys conjointly with the carriage to release or feed the computing mechanism, means controlled said numeral keys to determine the extent of rotation of the computing mechanism, and. means to prevent the operation of the numeral keys and the tabulating keys during the rotation ofthe computing mechanism.

25. Ina combined typewriting and computing machine, the combination of a stepby step lfeeding carriage, a power driven rotary computing mechanism including a member which has a denominational stepby-step movement concomitantly with the a set of type-operating alphabet keys, means controlled' by any of said keys to cause the carriage to feed, tabulating keys `for said carriage, means controlled by the numeral keys conjointly with the carriage to release or feed the computingmechanism, means controlled by said numeral keys to determine the extent of rotation of the computing mechanism and means to prevent the operation of the alphabet keys, the numeral keys and the tabulating keys during the rotation of the computing mechanism.

26. In a combined typewriting and computing machine, the combination of a stepby-step feeding carriagea power-driven rotary computing mechanism including a member which has a denominational stepby-step movement concomitantly with the carriage, a set of numeral keys, a set of type-operating alphabet keys, `a space key, means controlled by any of said keys to v cause the carriage to feed, tabulating `keys for said carriage means controlled by the numeral keys conjointlyv with the carriage to release or feed the computing mechanism, means controlled by said numeral keys to determine the extent of rotation of the computing mechanism, and means to prevent the operation of the alphabet keys, the numeral keys, the space key and the tabulating keys during the rotation of the computing mechanism.

27. In a combined typewriting. and adding machine, the combination of a step-bystep feeding carriage, keys to feed said car-l Laatse@ riage, said keys including. type-operating numeral key'sand type-operating alphabet keys, apower-driven computing mechanism including a member which has a denominational step-by-step movement concomitantly with thecarriage, said computing mechanism having an escapement Wheel the eX-.

tent of Whose rotation is controlled by said numeral keys, means dependent upon the operation of the numeral keysfor releasing or feeding said esca ement Wheel, a bar mounted to be moved y said alphabet keys at every de ression o f the latter, means for bar agamstmovement to prelocking sai vent operation of the keys, means controlled by said escapement Wheel to hold said locking means normally released, and means also coperating with said bar to prevent concomitant operation of any numeral key and any ofthe alphabet keys. 28. In a combined typewriting and adding machine, the combination of a step-by-step feeding carriage, keys to feed said carriage, said keys including type-operating numeral keys and type-operating alphabet keys, a power-driven computing mechanism including a member which has a denominational step-by-step movement concomitantly With the carriage, said computing mechanism having an escapement Wheel the extent of whose rotation is controlled by4 said numeral keys, means dependent upon the operation of the numeral keys -for releasing or feeding said 4esca ement Wheel, a bar mounted to be moved y said alphabet keys at every depression of the latter, means for locking said bar against movement to prevent operation ofthe keys, means controlled by said escapementl Wheel to hold said locking means normally released, a set of blades connected to said numeral keys, and a blade connected to said bar; all of said blades movable by their keys-to a position common to all of the blades, so that when one blade occupies such common position, the other blades are prevented from operating, whereby their keys are locked.

29. In a combined typewriting and adding machine, the combination of a step-bynumeral keys, means dependent upon theA operation of the numeral keys for releasing or feeding said escapement Wheel, a bar mounted to be moved by said alphabet keys at every deprsZssion of the latter, means forlocking said bar against movement to premuseo vent operation of the keys, means controlled bysaid escapement wheel to hold said locking means normally released, a set of blades connected to said connected to said bar; all of said blades movable by their keys to a position common to all ofthe blades, so that When one blade occupies such common position, the other said type key,

blades are prevented from operating, Whereby .their keys are locked, and means being lprovided for disconnecting said numeral keys at Will from the computing devices and from lsaid locking means and said blades.

30. In aicombined typevvriting and comthe combination With akey for operating ty e, of a traveling carriage,

Va tabulator key or arresting-said carriage, a computing mechanism,

an escapement therefor controlled by said carriage through and means for preventing the operation of said tabulator key until the operation of said escapement has been comleted. v

P 31, Ina combined typewriting and computing machine, the combination with a key for operating type, of a traveling carriage, an escapement for said carriage, a tabulator key, means controlled by said tabulator key for operating said escapement and arresting saidcarriage, computing mechanism, an escapement therefor controlled by said 'carriage escapement, and means for preventing said tabulator key from operating said carriaige escapeinent until the escapement of said computing mechanism has completed V its movement.

32. In a combined typewriting and computing machine, the combination With a traveling carriage, an escapement therefor, type-operating keys, and a .space key controlling step-by-step movements of said carriage through said escapement, of computi ingmechanism, an escapement therefor controlled by said carriage through said typeoperating keys, and means for preventing operation ofsaid space key to control sa1d i carriage escapement until the escapement of said computing mechanism has completed its movement.

'33. The combination with a traveling carriage, of a computing mechanism, a series of numeral keys connected -to control movements of said carriage and also connected to control the action of said computing mechanism to accord -With the numeral keys struck, alphabet keys, type actions operated by said alphabet keys, means for delaying the action of said computing mechanism initiated by the striking of a numeral key until the concomitant movement of the carriage initiated at the same period by the same numeral key has been completed, and means for preventing the subsequent actuation of numeral keys anda blade said concomitantly disconnecting said bar\\ `anism to accord with the any alphabet key or of the same or any other numeral key until the computing action initiated and started after the finish of the traveling movement of the carriage has itself been completed.

34. The combination With a travelingearriage, of a computing mechanism, a series of keys -including numeral keys for controlling step-by-step movements ofi said carriage, numeral keys being connectedy to said computing mechanism to control the action thereof to correspond with the numeral keys Struck, tabulatingkeys for controlling jump movements of said carriage, means for delaying the action of said Acomputing mechanism initiated by the striking of a numeral key until the movement of the carriage initiated by the same striking of the same numeral key has been completed, and means for preventing the actuation of said tabulating keys until the computation starting after the finish of the traveling movement of the carriage has itself been completed.

35. The combination'with a traveling carriage, of a computing mechanism, a series of keys including a set of numeral keys, said numeral keys being connected to control movements of said' carriage and actions of said computing mechanism, the latter to accord With the numeral keys actuated, locking elements connected to said numeral keys to prevent the concomitant actuation of more than one numeral key, normally ineective means for controlling the action of said computing mechanism from said carriage, shifting mechanism operated by said locking elements for rendering said lastmentioned means eiective, and a locking element operated by certain of said keys other than said numeral keys to coperate with said other locking elements to interfere with the action of said numeral keys, said lastmentioned locking element moving free and clear of said shifting mechanism so as to cause a locking action independent of a controlling action of said computing mechanism on the part of said carriage.

36. The combination with a traveling carriage, of a computing mechanism, a series of keys including numeral keys, said numeral keys being connected to control stepby-step. movements of said carriage and also to control actions of said computing mechnumeral keys actuated, normally ineffective means actuable from said carriage to control the action of said computing mechanism, a series oflocking elements connected to said numeral keys and coperating with one another to prevent the conjunctive action of tWo or more.

:lL-a.

elective to control the action of said computing mechanism, and a locking element cooperating with said first-mentioned locking elements and connected to be actuated by certain of said keys other than saidnumeral keys, so as to prevent the concomitant action of said numeral keys with certain others effective means forcontrolling the actionY of said computing mechanism from said carriage, shifting mechanism operated by said locking elements for rendering said means efective, a locking element operated by cervtainof said keys other than said numeral.

keys to coperate with said other locking elements to interfere With the action of said numeral keys, said last-mentioned locking element moving free and clear of said shifting mechanism so as to enable a locking action independent of a controlling action of said computing mechanism on the-part of said carriage, and means cooperating With said locking elements for preventing a subsequent movement of any of said keys until the computing action started in said com` uting mechanism by a numeral key has been completed.

38. The combination with a computing mechanism, of a series of numeral keys for controlling the action of said computing mechanism, individual connections from said numeral keys to said computing mechanism, and means connected to said connections for i blocking the computation-initiating movement of said connections subsequent to the return of the active key until a computing action previously initiated thereby has been completed.

39.V rlhe combination with a computing mechanism, of a series of numeral keys, individual connections from said numeral keys to said computing mechanism to enable the initiation of computations of said computing mechanism by said numeral keys, a member universal to all of said connections and actuable thereby at a computation-initiating movement thereof, and means for preventing the movement of said universal member in a computation-initiatingdirection after a key which has initiated a computation has returned, until such computation has been completed.

40. The combination with a series of keys including numeral keys and other keys, of a computing mechanism, individual connections from said numeral keys to said computing mechanism to enable the control of computations of said computing mechanism by said numeral keys, locking means controlled fromv said computing mechanism for preventing a computation-initiating movement of any of said connections subsequent to a prior initiating movement of one of said connections until the computation initiated has been completed, and connections from said locking means to said keys other than said numeral keys for preventing the actuation of any of said other keys until the said initiatedcomputation has been completed. i

41. The combination With a computing mechanism, of a set of keys including numeral keys and other keys, vof individual connections between said numeral keys and said computing mechanism enabling the control by said numeral keys of computations in said computing mechanism, each of said connections having a locking element, said locking elements coperating With one another to prevent conjunctive operation of tWo or more numeral keys, a locking element actuated by the keys other than said numeral keys and coperating with said other locking elements to prevent conjunc'tive actuations of said numeral keysand said other keys, and locking means actuated by said computing mechanism and coperating with all of said locking elements to prevent actuation of any of said numeral keys and any of said other'keys until an initiated computation has been completed.

42. The combination with a traveling carriage, of tabulating mechanism for controlling movements of said carriage, computing mechanism, a series of numeral keys for controlling the action of said computing mechanism to accord With the numeral keys struck, and locking means controlled from i said computing mechanism for preventing the actuation of said tabulating mechanism subsequent to the return of a numeral key after having initiated a computation While the initiated computation is still extant.

43. The combination with a computing head, of a master Wheel, said master Wheel and said computing head having a relative s tep-by-step denominational movement, a computing mechanism for running up numbers in said computing head through the intermediary of said master Wheel, numeral keys for actuating said computing mecha: nism and controlling said step-by-step movements, and locking means controlled from said computing mechanism for preventing said key-controlled step-by-step movements between said master wheel and said computinghead subsequent to the return movement of a numeral key after initiating a computing action while the initiated commeral keys for controlling an initiating computing action of said computing mechanism, means actuable by said numeral keys for initiating a relative movement. between said computing head and saidpmaster wheel in the same periodbthat a computation is initiated by said numeral keys in said computing mechanism, and locking means for preventing a. certain relative` movement between said computing head and said master wheel other than that determined by the'striking of a numeral key in initiating a computation while the initiated computation is still extant. l

45. The combination with a 'computing mechanism, of an escapement wheel for said computing mechanism, said escapement wheel having two movements, av major and a minor, for each computing action, and a pair of dogs coperating with said escapement wheel to initiate the major movement of said escapement wheel rst and the minor movementA of said escapement wheel second in each computation.

46. The combination with registering mechanism, of a carriage traveling to determine denominational selections of said registering mechanism, computing mechanism the computations run up in said registering mechanism, key mechanism solely for the purpose of effecting traveling movements ofsaid carriage, and locking mechanism for said key mechanism controlled from said computing mechanism and maintained in action during a running of said computing mechanism.

47. The combination with registeringl mechanism, of actuating mechanism for said registering mechanism, a carriage traveling to determine a relative traveling movement between said registering mechanism and said actuating mechanism, tabulating mechanismfor controlling major movements of said carriage,computing mechanism for determining the computation run into said registering mechanism by said actuating mechanism, and locking mechanism for preventing actuations of said tabulating mechanism and thus relative movements between said actuating mechanism and said registerva computing operation by said ing mechanism through said'carriage traveling due to said tabulating mechanism while sai actuating mechanism is running up numbers in said registering mechanism.

48. The combination with registering mechanism-of actuating mechanism for said,

registering mechanism, a carriage traveling to determine a relative traveling movement between lsaid registering mechanism and said actuating mechanism, tabulatingmechanism for controlling major movements of said carriage, computing mechanism for determining the computation run into said registering mechanism by said actuating mechanism, locking mechanism for preventing actuations of said tabulating mechanism and thus relative movements between said actuating mechanism and said registering mechanism through ing `due to said tabulating mechanism, while said actuating mechanism is running up numbers in said registering mechanism, and releasing means for silencing said locking means, said releasing means being actuated said carriage travelby said computing mechanism at the termi-` nation of a computing action thereby.

49. The combination with registering mechanism, of actuating mechanism for said registering mechanism, a carriage traveling to effect relative movements between said registering mechanism and said actuating mechanism, a spacing key for controlling movements of said carriage, computing mechanism for determining the computation run into said registering mechanism by said actuating mechanism, and locking means for preventing an actuation of said spacing key, said locking means being maintained in action while said computing mechanism is in action and being controlled from said `computing mechanism.

50. The combinationv with a computing mechanism, of la traveling carriage, numeral keys and others connected on the return movement thereof to permit a movement of said carriage, said numeral keys initiating computing mechanism, connections to said carriage for enabling a starting of a computing action initiated by a numeral key at such movement of said carriage, and a lock for preventing, after the return of a numeral key initiating a computing computation the subsequent actuation of said other keys while the computing action initiated is under way. 51. The combination with a computing mechanism, of a carriage traveling to eiiect denominational selections for said computing mechanism, numeral keys and other controlling traveling movements of said carriage, said numeral keys initiating a computing operation by said computing mechanism,lan escapement mechanism controlled by said numeral keys so as to permit a 

